Mt St Helens Flashcards

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1
Q

Date of eruption

A

18th May 1980

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2
Q

Deaths?

A

Approx 57, including Harry Truman with his cats

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3
Q

how many 2.6 or higher quakes were there in the 2 days before the eruption

A

174

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4
Q

What is the name of the bulge that grew on the side

A

cryptodome

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5
Q

Size of the earthquake that triggered the landslide

A

5.1

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6
Q

Speed of landslide

A

110-155 mp/h, it was the largest recorded landslide in history

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7
Q

How much land did the pyroclastic flows destroy

A

23x19 miles in a fan shape outward from the volcano

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